When I was little, things like cinema tickets, or swimming lessons or owning a dog or cat were fairly routine parts of childhood. Most kids in my bog standard state school had treats on this level, cost wise - obviously there have always been a group of people that can't stretch to any of these treats, but it was much more unusual. They seemed very affordable.
Nowadays, all of these things seem vastly more expensive relatively speaking, imo.
Is there any stuff like this you have thought of?